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聚乳酸和聚乙烯微塑料与甲基同时暴露在Daphnia magna上的毒性比较

Wajid Ali¹, Haksoo Jeong², Philippe Zinck³

¹Univ. Lille, CNRS, Centrale Lille, Univ. Artois, UMR 8181-UCCS-Unité de Catalyse et Chimie du Solide, F-59000 Lille, France; Univ. Lille, CNRS, Univ. Littoral Côte d'Opale, IRD, UMR-8187-LOG, Laboratoire d'Océanologie et de Géosciences, Station Marine de Wimereux, F-59000 Lille, France; Department of Biological Sciences, College of Science, Sungkyunkwan University, Suwon 16419, South Korea.

Marine pollution bulletin

|December 3, 2024

概括

像聚乳酸 (PLA) 微塑料 (MPs) 这样的生物塑料显示出显著的毒性,降低了大的生存率和繁殖率. 这些生物污染物可能会比传统塑料带来更大的风险,因为它们会增加污染物的毒性.

科学领域:

环境科学环境科学
生态毒理学生态毒理学
聚合物科学聚合物科学

背景情况:

微塑料 (MP) 污染是一个日益严重的环境问题.
包括聚乳酸 (PLA) 在内的生物塑料被推销为可持续的替代品,但它们对环境的影响和毒性尚未完全理解.
议员作为其他环境污染物的载体的作用需要进一步调查.

研究的目的:

为了比较PLA衍生生物微塑料 (bio-MPs) 与传统低密度聚乙烯 (LDPE) MPs的毒性和污染物载体能力.
评估这些MPs和甲基 (MeHg) 对水生生物的联合作用.
评估对大夫尼亚大的生存,繁殖,氧化应激,积和特定生物标记物的影响.

主要方法:

大的暴露于PLA生物MP和LDPEMP,单独或与甲基 (MeHg) 结合.
监测生存率,生殖产出和诱导氧化应激.
对积累,乙胆酶活性和维特洛根因基因表达的分析.

主要成果:

PLA生物-MPs显著降低了生存和繁殖,并诱导了大夫尼亚的大型的氧化应激.
与LDPEMP相比,PLA生物MP增强了的积累,并对乙胆酶活性和维特洛根因基因表达产生了负面影响.
PLA生物MPs和MeHg的组合加剧了毒性.

结论:

尽管PLA生物MP是生物降解的,但它可能会带来与传统MP相比或超过的重大环境风险.
PLA生物MPs可以充当载体,增加与甲基等共存污染物的生物积累和毒性.
进一步的研究对于了解水生环境中可生物降解的MPs相关的生态毒理风险至关重要.

关键词:

生物积累生物积累生物积累低密度聚乙烯的低密度聚乙烯.甲基是一种.氧化应激是一种氧化应激.聚乳酸是一种多乳酸.

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